Use these options to specify how the date range returns results. "Exact" means that the start and end dates of descriptions returned must fall entirely within the date range entered. "Overlapping" means that any description whose start or end dates touch or overlap the target date range will be returned.

The documents in the AC/100 series are primarily the records of meetings on topics relating to the military defence of NATO’s territory. Several topics were discussed: A- air defence B- the organization, dispersal and readiness of air force units C- the divisional organization of the land forces D- the duties and organization of the naval forces E- new weapons and equipment F- problems caused by ageing equipment